The extent of the game's online features had been unclear. But according to Japanese magazine Weekly Shounen Jump (translated by Andriasang) players play together in an online world.

Six races are available: Ogre, Elf, Dwarf, Pukuripo, Wedi and human. Players solve a mystery involving the human world. The overarching world is called Astoldia, split into four continents: Ogleed, Eltona, Dwachakka, Pukuland, and one island chain, Wena Islands. A central area displayed in the magazine appears to be the human world.

DQ10 Online is the first game in the main Dragon Quest series developed in-house at Square Enix, with 2004's DQ8 and 2009's DQ9 both made by Level-5. It's due out next year.

There may be an online fee. A post on the official Dragon Quest website mentioned both "price" and "usage fee", although both were listed as TBA.